3.3.5.3 How Do I Make A Function Inline?

You can ask the compiler to inline a function by using the inline specifier (see 5.8.1.2 Inline Specifier) or #pragma inline. This is only a suggestion to the compiler and cannot always be obeyed. Do not confuse this specifier/pragma with the intrinsic pragma⁽¹⁾ (see 5.14.3.4 The #pragma Intrinsic Directive), which is for functions that have no corresponding source code and which will be specifically expanded by the code generator during compilation.